import turtle
point=[340,0]
def haha():
    turtle.clear()
    turtle.up()
    turtle.goto(point)
    turtle.down()
    turtle.dot(30,'blue')
    point[0] -= 10
    turtle.ontimer(haha,200)

def ok(x,y):
    point[0]+=20

turtle.tracer(False)
haha()
turtle.onscreenclick(ok)
turtle.done()